If your internal organs have a purpose, God exists.

Without God, evolution is just a mindless process that has no aims or goals. This means that everything that results from evolution is purposeless, including internal organs. If our organs fo have a purpose, and not one that we're merely imagining, an external intelligence is required for such a purpose.

First, if you intend this as an argument for the existence of God, you are committing an appeal to consequences fallacy.

As for your assertions, I wouldn't say that evolution has no goals. The goals are survival and reproduction. Therefore the purpose of internal organs is to further those goals.

As for life itself having no purpose without God, I assume you find this undesirable. I'll offer another perspective. Which is preferable, having your life's purpose dictated by an outside agent, or being free to decide your own purpose?

Without God, evolution is just a mindless process that has no aims or goals. This means that everything that results from evolution is purposeless, including internal organs. If our organs fo have a purpose, and not one that we're merely imagining, an external intelligence is required for such a purpose.

How could evolution have goals? Evolution is a mindless process, like physics. In order to have goals you must possess intent (to reach the goal) and knowledge (of the goal itself). It's pretty obvious that mindless processes are incapable of both

A function is either just a description of activity (like describing water soaking into the soil as a 'function') or it's described in terms of something done in order to achieve something. You can say that our organs have a function in the first sense but not the second.